US Bridges

79NB Ramp to 65 NB over Ramp A1

Fair

Allegheny County, Pennsylvania · 1016 Ramp B2 over 02123 · Structure no. 000000000002788

Built
1975
50 years old, rebuilt 2010
Condition
Fair
inspected May 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
420 ft
3 main spans
Daily traffic
2,358
2024 count
Owner
State
State Highway Agency

About this bridge

79NB Ramp to 65 NB over Ramp A1 is a steel continuous girder and floorbeam system carrying 79NB Ramp to 65 NB over Ramp A1 in Allegheny County, Pennsylvania. It was built in 1975 and reconstructed in 2010, so it is 50 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,358 vehicles a day, roughly 7% of them trucks, projected to reach 3,877 by 2032. The structure is 420 ft (128 m) long and 34 ft wide.

Location

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Carries79NB Ramp to 65 NB
CrossesRamp A1
Location1016 Ramp B2 over 02123
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.5184, -80.13236
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating33 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length420 ft (128 m)
Longest span162 ft (49.4 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,358 (2024)
Projected traffic3,877 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$907,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was 79NB Ramp to 65 NB over Ramp A1 built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2010.

What condition is 79NB Ramp to 65 NB over Ramp A1 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does 79NB Ramp to 65 NB over Ramp A1 carry?

About 2,358 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is 79NB Ramp to 65 NB over Ramp A1?

The structure is 420 ft (128 m) long with a longest span of 162 ft (49.4 m) and a deck 34 ft wide.

Who owns 79NB Ramp to 65 NB over Ramp A1?

It is owned by the State Highway Agency.